. >> a warmer planet means we have a great likelihood of being unlucky, so the chances of texas seeing another drought, colorado seeing another epic year of wildfire, all of these things become far more likely. >> reporter: so does stress in the fields. drought has left a third of the corn crops in key states in poor or very poor condition, which means the cost of corn is going up, and the cost of food will follow. dairy products, beef, chicken all come from animals fed by corn. it's possible the heat wave we just had is just the first one of this summer. there's another mass of warm air ready to roll this way. >>> locally, farmers here at the farmers market have seen a bit of a mixed bag of effects on their crops. those farmers without a source of irrigation to their crops, the heat -- the severe heat can actually produce bigger and better produce. >> if you have proper irrigation and it's hot, everything is going to grow, so our beef this year, this week our -- last week they were huge. they were like jumbo-sized. everything seems to be coming on earlier than normal, because it's bee